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编辑：legacy-widget.php

<?php
/**
 * Server-side rendering of the `core/legacy-widget` block.
 *
 * @package WordPress
 */

/**
 * Renders the 'core/legacy-widget' block.
 *
 * @since 5.8.0
 *
 * @global WP_Widget_Factory $wp_widget_factory.
 *
 * @param array $attributes The block attributes.
 *
 * @return string Rendered block.
 */
function render_block_core_legacy_widget( $attributes ) {
	global $wp_widget_factory;

if ( isset( $attributes['id'] ) ) {
		$sidebar_id = wp_find_widgets_sidebar( $attributes['id'] );
		return wp_render_widget( $attributes['id'], $sidebar_id );
	}

if ( ! isset( $attributes['idBase'] ) ) {
		return '';
	}

$id_base       = $attributes['idBase'];
	$widget_key    = $wp_widget_factory->get_widget_key( $id_base );
	$widget_object = $wp_widget_factory->get_widget_object( $id_base );

if ( ! $widget_key || ! $widget_object ) {
		return '';
	}

if ( isset( $attributes['instance']['encoded'], $attributes['instance']['hash'] ) ) {
		$serialized_instance = base64_decode( $attributes['instance']['encoded'] );
		if ( ! hash_equals( wp_hash( $serialized_instance ), (string) $attributes['instance']['hash'] ) ) {
			return '';
		}
		$instance = unserialize( $serialized_instance );
	} else {
		$instance = array();
	}

$args = array(
		'widget_id'   => $widget_object->id,
		'widget_name' => $widget_object->name,
	);

ob_start();
	the_widget( $widget_key, $instance, $args );
	return ob_get_clean();
}

/**
 * Registers the 'core/legacy-widget' block.
 *
 * @since 5.8.0
 */
function register_block_core_legacy_widget() {
	register_block_type_from_metadata(
		__DIR__ . '/legacy-widget',
		array(
			'render_callback' => 'render_block_core_legacy_widget',
		)
	);
}

add_action( 'init', 'register_block_core_legacy_widget' );

/**
 * Intercepts any request with legacy-widget-preview in the query param and, if
 * set, renders a page containing a preview of the requested Legacy Widget
 * block.
 *
 * @since 5.8.0
 */
function handle_legacy_widget_preview_iframe() {
	if ( empty( $_GET['legacy-widget-preview'] ) ) {
		return;
	}

if ( ! current_user_can( 'edit_theme_options' ) ) {
		return;
	}

define( 'IFRAME_REQUEST', true );

?>
	<!doctype html>
	<html <?php language_attributes(); ?>>
	<head>
		<meta charset="<?php bloginfo( 'charset' ); ?>" />
		<meta name="viewport" content="width=device-width, initial-scale=1" />
		<link rel="profile" href="https://gmpg.org/xfn/11" />
		<?php wp_head(); ?>
		<style>
			/* Reset theme styles */
			html, body, #page, #content {
				padding: 0 !important;
				margin: 0 !important;
			}

/* Hide root level text nodes */
			body {
				font-size: 0 !important;
			}

/* Hide non-widget elements */
			body *:not(#page):not(#content):not(.widget):not(.widget *) {
				display: none !important;
				font-size: 0 !important;
				height: 0 !important;
				left: -9999px !important;
				max-height: 0 !important;
				max-width: 0 !important;
				opacity: 0 !important;
				pointer-events: none !important;
				position: absolute !important;
				top: -9999px !important;
				transform: translate(-9999px, -9999px) !important;
				visibility: hidden !important;
				z-index: -999 !important;
			}

/* Restore widget font-size */
			.widget {
				font-size: var(--global--font-size-base);
			}
		</style>
	</head>
	<body <?php body_class(); ?>>
		<div id="page" class="site">
			<div id="content" class="site-content">
				<?php
				$registry = WP_Block_Type_Registry::get_instance();
				$block    = $registry->get_registered( 'core/legacy-widget' );
				echo $block->render( $_GET['legacy-widget-preview'] );
				?>
			</div>
		</div>
		<?php wp_footer(); ?>
	</body>
	</html>
	<?php

exit;
}

// Use admin_init instead of init to ensure get_current_screen function is already available.
// This isn't strictly required, but enables better compatibility with existing plugins.
// See: https://github.com/WordPress/gutenberg/issues/32624.
add_action( 'admin_init', 'handle_legacy_widget_preview_iframe', 20 );

名称	权限	大小	修改时间	操作
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accordion	drwxr-xr-x	-	2026-05-01 02:14	删除
accordion-heading	drwxr-xr-x	-	2025-12-04 05:41	删除
accordion-item	drwxr-xr-x	-	2025-12-04 05:41	删除
accordion-panel	drwxr-xr-x	-	2025-12-04 05:41	删除
archives	drwxr-xr-x	-	2022-11-15 19:03	删除
audio	drwxr-xr-x	-	2022-11-15 19:03	删除
avatar	drwxr-xr-x	-	2022-11-15 19:03	删除
block	drwxr-xr-x	-	2024-07-17 11:52	删除
button	drwxr-xr-x	-	2022-11-15 19:03	删除
buttons	drwxr-xr-x	-	2022-11-15 19:03	删除
calendar	drwxr-xr-x	-	2022-11-15 19:03	删除
categories	drwxr-xr-x	-	2022-11-15 19:03	删除
code	drwxr-xr-x	-	2022-11-15 19:03	删除
column	drwxr-xr-x	-	2022-11-15 19:03	删除
columns	drwxr-xr-x	-	2022-11-15 19:03	删除
comment-author-name	drwxr-xr-x	-	2024-11-13 13:00	删除
comment-content	drwxr-xr-x	-	2022-11-15 19:03	删除
comment-date	drwxr-xr-x	-	2024-11-13 13:00	删除
comment-edit-link	drwxr-xr-x	-	2024-11-13 13:00	删除
comment-reply-link	drwxr-xr-x	-	2024-11-13 13:00	删除
comment-template	drwxr-xr-x	-	2022-11-15 19:03	删除
comments	drwxr-xr-x	-	2022-11-15 19:03	删除
comments-pagination	drwxr-xr-x	-	2022-11-15 19:03	删除
comments-pagination-next	drwxr-xr-x	-	2022-11-15 19:03	删除
comments-pagination-numbers	drwxr-xr-x	-	2022-11-15 19:03	删除
comments-pagination-previous	drwxr-xr-x	-	2022-11-15 19:03	删除
comments-title	drwxr-xr-x	-	2022-11-15 19:03	删除
cover	drwxr-xr-x	-	2026-05-01 02:14	删除
details	drwxr-xr-x	-	2026-05-01 03:37	删除
embed	drwxr-xr-x	-	2022-11-15 19:03	删除
file	drwxr-xr-x	-	2022-11-15 19:03	删除
footnotes	drwxr-xr-x	-	2023-08-09 11:43	删除
freeform	drwxr-xr-x	-	2026-05-01 03:14	删除
gallery	drwxr-xr-x	-	2022-11-15 19:03	删除
group	drwxr-xr-x	-	2022-11-15 19:03	删除
heading	drwxr-xr-x	-	2022-11-15 19:03	删除
home-link	drwxr-xr-x	-	2022-11-15 19:03	删除
html	drwxr-xr-x	-	2022-11-15 19:03	删除
image	drwxr-xr-x	-	2023-11-08 10:55	删除
latest-comments	drwxr-xr-x	-	2022-11-15 19:03	删除
latest-posts	drwxr-xr-x	-	2022-11-15 19:03	删除
legacy-widget	drwxr-xr-x	-	2022-11-15 19:03	删除
list	drwxr-xr-x	-	2022-11-15 19:03	删除
list-item	drwxr-xr-x	-	2022-11-15 19:03	删除
loginout	drwxr-xr-x	-	2024-11-13 13:00	删除
math	drwxr-xr-x	-	2025-12-04 05:41	删除
media-text	drwxr-xr-x	-	2026-05-01 01:56	删除
missing	drwxr-xr-x	-	2022-11-15 19:03	删除
more	drwxr-xr-x	-	2022-11-15 19:03	删除
navigation	drwxr-xr-x	-	2023-11-08 10:55	删除
navigation-link	drwxr-xr-x	-	2022-11-15 19:03	删除
navigation-submenu	drwxr-xr-x	-	2022-11-15 19:03	删除
nextpage	drwxr-xr-x	-	2022-11-15 19:03	删除
page-list	drwxr-xr-x	-	2022-11-15 19:03	删除
page-list-item	drwxr-xr-x	-	2023-03-30 09:26	删除
paragraph	drwxr-xr-x	-	2026-05-01 03:14	删除
pattern	drwxr-xr-x	-	2022-11-15 19:03	删除
post-author	drwxr-xr-x	-	2025-12-04 05:42	删除
post-author-biography	drwxr-xr-x	-	2024-11-13 13:00	删除
post-author-name	drwxr-xr-x	-	2024-11-13 13:00	删除
post-comments-count	drwxr-xr-x	-	2025-12-04 05:41	删除
post-comments-form	drwxr-xr-x	-	2022-11-15 19:03	删除
post-comments-link	drwxr-xr-x	-	2025-12-04 05:41	删除
post-content	drwxr-xr-x	-	2025-04-16 11:06	删除
post-date	drwxr-xr-x	-	2022-11-15 19:03	删除
post-excerpt	drwxr-xr-x	-	2022-11-15 19:03	删除
post-featured-image	drwxr-xr-x	-	2022-11-15 19:03	删除
post-navigation-link	drwxr-xr-x	-	2023-03-30 09:26	删除
post-template	drwxr-xr-x	-	2025-04-16 11:06	删除
post-terms	drwxr-xr-x	-	2022-11-15 19:03	删除
post-time-to-read	drwxr-xr-x	-	2025-12-04 05:41	删除
post-title	drwxr-xr-x	-	2022-11-15 19:03	删除
preformatted	drwxr-xr-x	-	2022-11-15 19:03	删除
pullquote	drwxr-xr-x	-	2022-11-15 19:03	删除
query	drwxr-xr-x	-	2024-04-03 10:16	删除
query-no-results	drwxr-xr-x	-	2022-11-15 19:03	删除
query-pagination	drwxr-xr-x	-	2022-11-15 19:03	删除
query-pagination-next	drwxr-xr-x	-	2022-11-15 19:03	删除
query-pagination-numbers	drwxr-xr-x	-	2022-11-15 19:03	删除
query-pagination-previous	drwxr-xr-x	-	2022-11-15 19:03	删除
query-title	drwxr-xr-x	-	2022-11-15 19:03	删除
query-total	drwxr-xr-x	-	2025-04-16 11:06	删除
quote	drwxr-xr-x	-	2022-11-15 19:03	删除
read-more	drwxr-xr-x	-	2022-11-15 19:03	删除
rss	drwxr-xr-x	-	2022-11-15 19:03	删除
search	drwxr-xr-x	-	2026-05-01 03:14	删除
separator	drwxr-xr-x	-	2022-11-15 19:03	删除
shortcode	drwxr-xr-x	-	2022-11-15 19:03	删除
site-logo	drwxr-xr-x	-	2022-11-15 19:03	删除
site-tagline	drwxr-xr-x	-	2024-11-13 13:00	删除
site-title	drwxr-xr-x	-	2023-03-30 09:26	删除
social-link	drwxr-xr-x	-	2026-05-01 02:12	删除
social-links	drwxr-xr-x	-	2026-05-01 02:25	删除
spacer	drwxr-xr-x	-	2022-11-15 19:03	删除
table	drwxr-xr-x	-	2022-11-15 19:03	删除
tag-cloud	drwxr-xr-x	-	2024-11-13 13:00	删除
template-part	drwxr-xr-x	-	2022-11-15 19:03	删除
term-count	drwxr-xr-x	-	2025-12-04 05:41	删除
term-description	drwxr-xr-x	-	2023-08-09 11:43	删除
term-name	drwxr-xr-x	-	2025-12-04 05:41	删除
term-template	drwxr-xr-x	-	2025-12-04 05:41	删除
terms-query	drwxr-xr-x	-	2025-12-04 05:41	删除
text-columns	drwxr-xr-x	-	2022-11-15 19:03	删除
verse	drwxr-xr-x	-	2022-11-15 19:03	删除
video	drwxr-xr-x	-	2022-11-15 19:03	删除
widget-group	drwxr-xr-x	-	2022-11-15 19:03	删除
accordion-item.php	-rw-r--r--	2.35 KB	2025-12-04 05:41	编辑下载删除
accordion.php	-rw-r--r--	1.12 KB	2025-12-04 05:41	编辑下载删除
archives.php	-rw-r--r--	4.31 KB	2025-12-04 05:41	编辑下载删除
calendar.php	-rw-r--r--	5.93 KB	2024-07-17 11:51	编辑下载删除
categories.php	-rw-r--r--	4.54 KB	2025-12-04 05:41	编辑下载删除
comments-pagination-next.php	-rw-r--r--	1.88 KB	2024-11-13 13:00	编辑下载删除
comments-pagination-numbers.php	-rw-r--r--	1.59 KB	2024-07-17 11:51	编辑下载删除
comments-pagination.php	-rw-r--r--	1.23 KB	2025-12-04 05:41	编辑下载删除
cover.php	-rw-r--r--	3.1 KB	2025-04-16 11:06	编辑下载删除
error_log	-rw-r--r--	39.29 KB	2026-05-01 18:01	编辑下载删除
gallery.php	-rw-r--r--	6.29 KB	2025-12-04 05:41	编辑下载删除
latest-comments.php	-rw-r--r--	4.91 KB	2025-12-04 05:41	编辑下载删除
legacy-widget.php	-rw-r--r--	3.92 KB	2025-12-04 05:41	编辑下载删除
media-text.php	-rw-r--r--	4.28 KB	2024-11-13 13:00	编辑下载删除
page-list-item.php	-rw-r--r--	361 B	2024-07-17 11:51	编辑下载删除
page-list.php	-rw-r--r--	13.29 KB	2024-11-13 13:00	编辑下载删除
post-author-biography.php	-rw-r--r--	1.49 KB	2024-07-17 11:51	编辑下载删除
post-author-name.php	-rw-r--r--	1.91 KB	2025-05-01 11:02	编辑下载删除
post-author.php	-rw-r--r--	2.67 KB	2025-05-01 11:02	编辑下载删除
post-excerpt.php	-rw-r--r--	3.53 KB	2025-12-04 05:41	编辑下载删除
post-time-to-read.php	-rw-r--r--	6.34 KB	2025-12-04 05:41	编辑下载删除
query-no-results.php	-rw-r--r--	1.8 KB	2024-07-17 11:51	编辑下载删除
query-pagination-next.php	-rw-r--r--	3.69 KB	2025-12-04 05:41	编辑下载删除
query-pagination-numbers.php	-rw-r--r--	4.66 KB	2024-07-17 11:51	编辑下载删除
query-pagination.php	-rw-r--r--	1.15 KB	2024-07-17 11:51	编辑下载删除
search.php	-rw-r--r--	23.26 KB	2025-12-04 05:41	编辑下载删除
site-tagline.php	-rw-r--r--	1.17 KB	2024-07-17 11:51	编辑下载删除
site-title.php	-rw-r--r--	1.82 KB	2025-12-04 05:41	编辑下载删除
social-link.php	-rw-r--r--	66.15 KB	2025-12-04 05:41	编辑下载删除
tag-cloud.php	-rw-r--r--	1.55 KB	2024-11-13 13:00	编辑下载删除
term-name.php	-rw-r--r--	2.02 KB	2025-12-04 05:41	编辑下载删除
widget-group.php	-rw-r--r--	2.38 KB	2024-07-17 11:51	编辑下载删除